main { width:100%; height:100%; position:relative; background:#6639E5; }
main section { width:450px; min-height:450px; padding:50px 30px; border-radius:20px; position:absolute; top:50%; left:50%; transform:translate(-50%, -50%); background:#fff; }
main section .back_btn { border:0; background:none; min-width: 0; padding: 0;}
main section h3 { margin-top:30px; line-height:32px; font-weight:600; color:#333; }
main section h3 span { font-weight:700; }
main section .email ul { width:calc(100% - 60px); position:absolute; left:30px; bottom:50px; }
main section .email ul li { margin-top:20px; transition:all 0.5s ease; display:none; }
main section .email ul li.active { display:block; }
main section .email ul li:first-child { margin-top:0; }
main section .email ul li .label { margin-bottom:10px; }
main section .email ul li .info { margin-top:5px; font-size:12px; color:#777; }
main section .email ul li .time {color:rgba(2, 115, 251, .5); font-size:12px; margin:0; text-align:right; position:absolute; }
main section .email ul li input { width:100%; height:50px; padding:0 15px; border:1px solid #ddd; border-radius:5px; }
main section .email ul li button { width:100%; height:50px; font-weight:600; border:0; border-radius:5px; color:#fff; background:#6639E5; }
main section .email ul li button.certify_btn { margin-top:30px; }
main section .email ul li button.check_btn { margin-top:30px; }
main section .email ul li button.join_btn { margin-top:30px; }
main section .email ul li div { display:flex; gap:10px; }
main section .email ul li div input { width:calc(100% - 75px); }
main section .email ul li div button { width:75px; }
main section .email ul li.check button.certify_btn { display:none; }
main section .email ul li#step3 .info { margin-bottom:10px; }
main section .email_completion { padding-top:100px; text-align:center; display:none; }
main section .email_completion .logo { margin-bottom:10px; font-size:16px; font-weight:700; }
main section .email_completion h3 { margin:0; }
main section .email_completion p.id { margin:50px 0; font-size:16px; color:#666; text-decoration:underline; }
main section .email_completion button.login_btn { width:calc(100% - 60px); height:50px; font-weight:600; border:0; border-radius:5px; color:#fff; position:absolute; left:30px; bottom:50px;  background:#6639E5; }